SDXC Performance and Reliability?

Hey all, I'm about to receive my new MacBook Pro 13" which I am very excited about the only thing is I opted for the 128gb ssd for the speed so I am slightly limited on space.

I was wondering, since the new MacBook Pro's support the SDXC standard, what would the performance and reliability be like using a 128GB SDXC card as, say the location for my iTunes library?

Thanks in advance!

ColinTheJanitor.

 

Has no-one had any experience with this?